/// <summary>
/// Moves the robot forwards one space in the current direction
/// </summary>
public void Move()
{
// cannot move if robot has not been placed
if (isPlaced)
{
// determine new location
int newX = currentX;
int newY = currentY;
switch (currentFacing)
{
case Direction.NORTH:
newY++;
break;
case Direction.EAST:
newX++;
break;
case Direction.SOUTH:
newY--;
break;
case Direction.WEST:
newX--;
break;
}
// only allow move to a valid location
if (currentTableTop.IsValidLocation(newX, newY))
{
currentX = newX;
currentY = newY;
}
}
}
/// <summary>
/// Places the robot on a table top in the specified position, facing the
/// specified direction.
/// </summary>
/// <param name="x">The X position on the table top</param>
/// <param name="y">The Y position on the table top</param>
/// <param name="facing">The direction to face</param>
/// <param name="tableTop">The table top object to act on</param>
public void Place(int x, int y, Direction facing, TableTop tableTop)
{
// can only place if we have a table top and a valid location
if (tableTop != null && tableTop.IsValidLocation(x, y))
{
currentTableTop = tableTop;
currentX = x;
currentY = y;
currentFacing = facing;
isPlaced = true;
}
}
